Hello, xzqzq. I had thought about using it until I recieved my Fouling Shot from the CBA (Cast Bullet Association). Fellow used it in a mint trapdoor..cleaned with smokeless solvent & put away. few weeks later bore was found to be full of rust and pitted. B.H. has changed wording on container since then that this powder is non-corrosive..it has Potasium Percholrates in it.